Question

When a litre of water is introduced in human blood?
A. BMR decreases
B. RBC collapses And urine production increases
C. BMR increases
D. RBC collapses and urine production decreases

Answer 1

Hint: Water due to its high dielectric constant property can dissolve many molecules. Since all the biomolecules are a complex organisation of lipids, proteins, nucleic acids which are chemical in nature can bind with water based on their polarity.

Complete answer:
Blood is the only tissue which is made up of 90% of water and the remaining 10% comprises RBC, WBC and platelets and other proteins such as albumin, globulin and so on. Since RBC is an anucleate cell, water can enter the cell with great concentration and lysing the cell. This process is also known as plasmolysis, resulting in the collapse of RBC. Increase in the quantity of water upto 1 litre can also increase urine formation in the stage of urine concentration. Urine formation occurs in two main processes: urine filtration and urine concentration. In the first stage toxin is removed from the body by glomerular filtration along with water and in the next stage the concentration of water is checked in order to protect the remaining components of blood. Increase in quantity of water can increase the quantity of urine formation.

Hence the correct answer is OPTION(B)

Note: Water plays a major role in human body regulation and is present in different quantities in different organs, 60% of human body comprises of water, brain and heart consists of 73% of water, lungs consist of 83% and skin has 64% of water, muscles and kidneys have 79% and bones have 31%.